Condensed Statements of Cash Flows	9 Months Ended
	Oct. 31, 2018 USD ($)
Operating activities
Royalties received	$ 34,316,372
Interest received	74,962
Expenses paid	(1,054,741)
Net cash from operating activities	33,336,593
Investing activities
Maturities of U.S. Government securities	28,893,900
Sale of U.S. Government securities	99,740
Purchases of U.S. Government securities	(37,767,613)
Net cash used for investing activities	(8,773,973)
Financing activity
Distributions to unitholders	(24,272,019)
Net change in cash and cash equivalents	290,601
Cash and cash equivalents, beginning of period	314,835
Cash and cash equivalents, end of period	605,436
Reconciliation of net income to net cash from operating activities
Net income	38,772,365
Increase in accrued income receivable	(4,154,875)
Increase in contract asset	(1,263,633)
Increase in prepaid expense	(40,703)
Increase (decrease) in accrued expenses	23,439
Net cash from operating activities	33,336,593
Non cash financing activity
Distributions declared and payable	$ 12,332,809